Speed-change gear



June 5, 1923.

E. 4w. JACKSON SPEED CHANGE GEAR 4 ATTORNEYS.

June, 5, 1923. 1,457,526

E. w. JACKSON SPEED CHANGE GEAR Original Filed. July 28 1920 2 Sheets-Sheet 2 F/cs: a. A 33 INVENTOR. 51?/Vf 57 l1( dif/(50N BVM/70d@ Patented June 5, 1923.

UNITE STATES ERNEST W. JACKSON, OF SAUSALITO, CALIFORNIA.

4srruan-CHANGE GEAR.

Application led July 28, 1920, Serial No. 399,546. RenewedMai-ch 3, 1922. Serial No. 540,938.

To all whom it may concern:

Be it known that I, ERNEST W. JACKSON, a citizen of the United States of America, and a resident of Sausalito, county of Marin, and State of California, have invented a new and useful Speed-Change Gear, of which the following is a specification.

My invention relates to a speed change gear or transmission mechanism, and one of its objects is to provide means which may be appli/ed to the driving shaft of an automobile to increase the number of speeds over the number available from standard equipment.

Another object of the invention is to provide a compact self-contained fully enclosed gear unit-in which complete and constantl lubrication of the working parts is assured.

My invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the invention. It is to be understood that I do not limit myself to the showin made by the said description as I may a opt variant forms of my' invention within the scope of the claims.

Referring to the drawings: Fig. 1 is a vertical sectional view of my transmission mechanism. Figs. 2 and 3 are vertical sectional views, the respective planes of section being indicated by the lines 2-2 and 3-3 of Fig. 1.

My transmission mechanism comprises a housing consisting of forward and rear sections 2 and 3 respectively interposed in the torque tube 4. he housing parts are secured together by bolts 6 and to the torque tube ends by bolts 7, thru laterally extending flanges 8.

In the present instance, the shaft 11, Fig. 1, was originally a part of the shaft 12 and together formed the drive shaft extending from the drive shaft pinion of the differential to the universal joint. It is assumed that this drive shaft was severed and my gearing mechanism interposed between the severed Earts. A ke 13 secures the shaft 12 to the ell-shaped ange 14 on whichV the internal gear 16 is secured. The flange is provided with an aperture 17 thru which lubricant may pass. A key 18 secures the shaft 11 to a sleeve 19 which also encloses the adjacent end of shaft 12 to preserve the alinement of the shafts. The sleeve 19 is provided with a ange 21 upon which are disposed stub shafts on which planet gears or vpinions 22, 23 and 24, respectively, are rotatably mounted to mesh with the internal gear 16. The insideof the sleeve is lined with a suitable antifriction bushing 26 and the sleeve is formed with one or more apertures 27 to permit lubricant to work into the bearing. Bolted to the sleeve 19 is a hardened ring 28 provided with recesses 29 to receive similarly shaped teeth or keys 31 on the sleeve 32 which is slidably and rotatably mounted on the sleeve 19. Mounted on the sleeve 32 is a sun gear 33 the keys 31 engaging similarly formed ways in the gear, so that the sleeve is slidable but not rotatable therein. The gear'33 is-in mesh with all three of the gears 22, 23 and 24. A housing plate v34 non-rotatably fixed in the housing 2 by means of suitable projections interlocking with the housing, is retained in position adjacent the gears by the stiff spring 42. The shaft 42 is journaled in bearings 43 half of which are formed in each abutting edge of the housing parts 2 and 3; Theshaft .I is turned to shift the sleeve 32 by the lever 44 which in turn is connected by a rod 46 with a suitable shifting lever convenient to the drivers hand.

It will be clear from the above that the sleeve 32 may be shifted longitudinally to any one of three positions.

`(1) In locked engagement with the fixed housing pla-te 34, as shown in Fig.' 1, thus `holding the sun gear 33 stationary. In this vposition the rotation of the engine driven shaft- 12 and internal geai` 16 causes the planet gears 22,23 and 24 to roll around the fixed sun gear, thus rotating the planet gear mounting 21 and sleeve 19 and the shaft 11 keyed thereto, at a slower speed than the shaft 12.

(2) To neutral position in which the key 31 are free of engagement with plate 34 and ring 28 respectively;

(3) In locked engagement with the ring 28, the keys 31 engaging therein so that the sun gear` is locked to the planet gear mounting 21. Since the planet gears are 'now prevented from turning', the planetge'ar mounting is locked to the internal gear 16, so that both shafts 12 and 11 turn together at the same speed.

. Since the' regular or .primary transmission system of theautomobile provides two forward speeds and lone reverse .speed atl I which the Shaft i2 may be driven from the my secondary transmission provides two from the shaft' 12 say engine, say in'ratios 1 to 1 and 1 to 3, for forward speeds, and'l to 4 in reversegand speeds at which the shaft 11 may be driven in the ratios of 1 to 1 and 1 vto 15;, it follows .that my secondary gearing attachment provides meansintermediate speed between the present high and lo'w and a second and lower low speed, and in reverse it adds a second and lower speed.

all portions of the working parts.

It is. obvious that -if desired the apparatus maybe reversed iii position, so that the shaft 11 may be driven at a speed higher than that of the shaft l2- vinstead of lower as in the structure just explained. I claim: 1. In a transmission mechanism a pair of Aali'ne'dsh'afts, an internalgear fixed on onel ofthe shafts, a sleeve bfixed on the other shaft, -a pinion carried by the sleeve and in mesh with the internal gear, a second gear in mesh with the .pinion and a slidable member for stopping the second gear or for locking itto the sleeve-carrying the pinion. 2.. In a transmission mechanism thecombinationof an enclosing housing, a pair' of alined shafts extending into the housing, an internal gear fixed on one ofthe shafts,

a sleeve fixed on the other shaft, a plurality of 'pinions carried .by said ysleeve and in mesh with the internal gear, a second gear -.in mesh with the vpinions and aslidable member 4for locking vthe second gear to the housing or for locking itto the sleeve carrying the pinions.-

' 3. In a transmission mechanism the combination of an enclosing housing, a pair of. alined shafts extending into said fhousin'g, an' interna1 geary fixed on .one of the shafts,

. a' sleeve fixed on the other shaft, aplur'a'lity of pinionsfcarried bysaid sleeve and in mesh with theinternal gear, .a vsecond ear in mesh with the pinions, a plate-fixed in the housings 4adjacent the gears, and' a" slidable sleeve for .locking the second gear ing'and a driven shaft, a planet gear mounted'oii one to said plate or for locking it to the sleeve carrying the pinions.

4. In a transmission mellianism, a driving and a@ driven shaft, a xed element, a

planet gear mounted on one 'of said shafts,

in'terlockable withsaid fixed mem er and with said planetgear mounting.

5.' In a transmission mechanism, a driving and a driven shaft, a fixed element, a planet gearmounted on one of said shafts, a gear in mesh -with said planetgear fixed on the other shaft, a'second gear in mesh with 'said planet gear, a sleeveslidableinsaid 4% second gear and fixed for rotation therewith and interlockable with said :fixed member and with said planet gear mounting, land means for moving said sleeve into either of said interlockedpositions.

6.1111 a transmission mechanism, alined driving and driven shafts, a sleeve fixed onsaid -driven shaft and enclosing said driving shaft, a planet gear mounted on said A suitable lubricant Ais placed in the for` ward end of the housing and finds its way to sleeve, an internal gear in mesh with-said planet gear fixed on the driving shaft, a

slidable-sleeve rotatably disposed 'on said planetgear sleeve, a housing plate fixed adjacent said gears, a secondl gear in mesh with said.. planet gear and fixed for rotation with said slidable sleeve, means on said slidable sleeveand planet" gear sleeve' and housing plate. whereby the slidable sleeve maybe interlocked with either the'.

in mesh with said'planet gear fixed onthe other shaft, a second gear in mesh withsaid planet gear, la sleeve slidabl in said second gear and fixedfor rotation therewith and interlocka'ble with said fixed member and with said planet gear mounting, anda coliio lar and yoke for movingv said'sleeve into i either of said interlocked positions.

8. In a transmission mechanism, a driviixed element, a of said shafts, a gear in mesh with said '-planet'gear fixed ou the lother shaft, a` second gear in mesh with v said planet gear, a slidable member fixed member and with' -forrotation with said second gear and "inter' Vlockable with said fixed said planetgear 'mounting, and a collary and yoke for 'moving said sleeve into .either of said interlocked positions.

iso

` VIn testimony whereof, I have hereuntoset 

